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Revision 62 - (hide annotations) (download)
Mon May 2 23:53:39 2005 UTC (9 years, 3 months ago) by vapier
File size: 17874 byte(s)
dlvsym doesnt exist in uClibc

1 ferringb 2 # ChangeLog for Path Sandbox
2 vapier 53 # Copyright 1999-2005 Gentoo Foundation; Distributed under the GPL v2
3 ferringb 2 # $Header$
4    
5 vapier 62 02 May 2005; Mike Frysinger <vapier@gentoo.org> configure.in, localdecls.h,
6     sandbox.h:
7     uClibc doesn't support dlvsym() so add a configure check to make sure it doesn't
8     exist. Also update localdecls.h so BROKEN_RTLD_NEXT isn't defined in uClibc.
9    
10 azarah 59 * sandbox-1.2.3 (2005/04/29)
11    
12 azarah 56 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> configure.in:
13     Do not check for (*&#$(* CXX or F77.
14    
15 azarah 54 29 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
16     Do not append '/' to pathname in filter_path() if it already ends with it.
17    
18 vapier 53 28 Apr 2005; Mike Frysinger <vapier@gentoo.org> Makefile.am, configure.in:
19     With az's help, clean up autotools to work with cross-compiling.
20    
21 azarah 59 * sandbox-1.2.2 (2005/04/28)
22 azarah 48
23 azarah 47 28 Apr 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
24     Only check for /dev/{null,zero} for unlink hack, else ricers using /dev/shm
25     have issues; bug #90592.
26    
27 azarah 59 * sandbox-1.2.1 (2005/04/23)
28 azarah 44
29 azarah 43 23 Apr 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
30     getcwd.c, libsandbox.c, localdecls.h, sandbox.h, sandbox_futils.c:
31     Make sure all functions used in libsandbox.c is declared static. Define
32     SB_STATIC in localdecls.h for this. Include sandbox_futils.c rather than
33     linking with its object. Hopefully this will fix bug #90153.
34    
35 azarah 59 * sandbox-1.2 (2005/04/23)
36 azarah 46
37 azarah 40 22 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
38     Allow lchown a symlink in write-allowed path pointing to write-denied
39     target.
40    
41 genone 39 21 Mar 2005; Marius Mauch <genone@gentoo.org> libsandbox.c:
42     Also show resolved symlink names in the log.
43    
44 azarah 37 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, libsandbox.c:
45     Seems -nostdlib was the problem with the constructor/destructor - remove it
46     from Makefile.am, and change the constructor/destructor names again.
47    
48 azarah 36 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
49     Also rename the _init() and _fini() declarations.
50    
51 azarah 35 14 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c:
52     Fixup the constructor/destructor function names again (they should be _init()
53     and _fini() it seems, and not being called caused sandbox_lib_path to be
54     unset, and thus breaking the execve() wrapper's LD_PRELOAD protection).
55     Add both the path in given SANDBOX_x variable, as well as its symlink
56     resolved path in init_env_entries(). Modify filter_path() to be able to
57     resolve paths without resolving symlinks, as well as to be able to resolve
58     symlinks. Fix a possible segfault in check_access(). Add symlink resolving
59     to check_access() resolving bug #31019. Add 'hack' for unlink, as the fix
60     for bug #31019 cause access violations if we try to remove a symlink that is
61     not in protected path, but points to a protected path. Fix a memory leak in
62     sandbox.c (sandbox_pids_file in main()). Fix the realpath() calls in main()
63     (sandbox.c) being unchecked. Fix the debug logname not having the pid in it
64     (pid_string was uninitialized). General syntax cleanups.
65    
66 ferringb 34 09 Mar 2005; Brian Harring <ferringb@gentoo.org> sandbox.c: Fixed the
67     infamous "pids file is not a regular file" w/out newline bug.
68    
69 ferringb 33 09 Mar 2005; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in:
70     Correct libc_version path detection, since it was screwing up if libdir !=
71     "/lib/".
72    
73     02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> libsandbox.c:
74 azarah 32 Hack to make sure sandboxed process cannot remove a device node, bug #79836.
75    
76 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am:
77 azarah 31 Fix symbols.in not added to dist.
78    
79 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
80 azarah 30 getcwd.c, libsandbox.c, sandbox.c, sandbox.h, sandbox_futils.c:
81     White space fixes.
82    
83 ferringb 33 02 Mar 2005; Martin Schlemmer <azarah@gentoo.org> Makefile.am, canonicalize.c,
84 azarah 30 configure.in, getcwd.c, libsandbox.c, symbols.in:
85 azarah 29 Fix inverse test logic in canonicalize.c, use a strncpy. Fix gcc warning in
86     getcwd.c. Add symbols.in and logic to Makefile.am to generate symbol versions
87     for glibc and other libc's that use this. Update libsandbox.c to use these
88     symbol versions if available. Fix exec wrapper to re-export LD_PRELOAD if the
89     process unset it.
90    
91 ferringb 33 01 Mar 2005; Brian Harring <ferringb@gentoo.org> libsandbox.c:
92 ferringb 28 killed off _init and _fini in favor of
93     void __attribute__ ((constructor)) init_func and
94     void __attribute__ ((destructor)) closing_func. _(init|func) were deprecated.
95    
96 ferringb 26 06 Dec 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, libsandbox.c,
97     canonicalize.c, getcwd.c: Fixed compilation *again*. Hopefully cvs is done
98     having the hick-ups.
99    
100 ferringb 24 04 Dec 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, getcwd.c,
101     Makefile.am: Fixed compilation.
102    
103 ferringb 18 01 Dec 2004; Brian Harring <ferringb@gentoo.org> aclocal.m4:
104     Gutted the bugger so it stops checking for a c++ and fortran compiler.
105     Do *not* regenerate aclocal.m4 for making a release until a better
106     solution is created.
107    
108 ferringb 16 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, sandbox_futils.c:
109     Removal of more hardcoded paths.
110    
111 ferringb 13 20 Nov 2004; Brian Harring <ferringb@gentoo.org> Makefile.am, configure.in,
112     sandbox_futils.c: tweaks to install sandbox.bashrc, and use it.
113    
114     19 Nov 2004; Brian Harring <ferringb@gentoo.org>:
115 ferringb 6 Sandbox is now autotooled, create-localdecls needs to be killed and the code
116     shifted into configure.in. Currently builds *one* libsandbox.so- if multiple
117     are desired (-m64 and -m32 for amd64), the ebuild should do it (imo).
118     To get to a point of testing, automake && autoconf; created requisite files w/
119     a(utomake|clocal)-1.8, and autoconf 2.59. Installs to /usr/, instead of
120     /lib and /usr/lib/portage/bin.
121    
122 ferringb 2 14 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox.c:
123     closing out bug #70225, potential overflow of the sandbox_pids_file var.
124    
125     07 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c: c99 standard,
126     (think it was at least) allows intermixing of code and data segments. bug #70351
127     should be fixed by this.
128    
129     03 Nov 2004; Brian Harring <ferringb@gentoo.org> libsandbox.c, sandbox_futils.c:
130     futils fix from bug #65201 via solar, and libsandbox log path checks via #69137
131    
132     02 Aug 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Code from
133     Seth Robertson that tracked down all adjuct flags for read operations that
134     do not invoke a write operation.
135    
136     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
137     Another fix from jstubbs regarding a free() on a stack variable for the
138     environment -- tracking now prevents extraneous free()'s segfault.
139    
140     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c, sandbox.c:
141     J. Stubbs tracked down a new bug where mkdir was failing to the patch on
142     the lstat in mkdir... it now only returns 0 or -1 as documented for mkdir.
143     Also remove the errno = ESUCCESS settings as documentation points out that
144     a library isn't allowed to do that.
145    
146     04 Apr 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c: Added a
147     file_security_check() function to check random potential exploits on files
148     that sandbox is to load and read -- Normally sandboxpids.tmp. This fixes
149     the 'system-crippling' exploits (bug 21923) and catches a few other
150     potential problems.
151    
152     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> Makefile: Updates for
153     32/64 bit sandbox. Made CC and LD '?=' values to allow passed in CC to work.
154    
155     20 Mar 2004; Nicholas Jones <carpaski@gentoo.org> libsandbox.c:
156     bug 42048 -- Fixed the lstat/errno conditions for mkdir <caleb@g.o>.
157     Added the 64/32 bit sandbox patch for AMD64 bug 32963 <brad/azarah>.
158    
159     29 Feb 2004; Martin Schlemmer <azarah@gentoo.org> sandbox.c, sandbox_futils.c :
160     Fix permissions and group of pids file and logs. Permissions should be 0664
161     and group should be 'portage'. Bug #34260.
162    
163     28 Feb 2004; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
164     Besides a small cleanup, redo how we replace LD_PRELOAD in the environ passed
165     to the real execve (in our execve wrapper). Seems that on some arches (sparc
166     among others) do not allow us to tamper with the readonly copy passed to
167     execve, so pass our own copy of the environment. Bug #42290.
168    
169     11 Jan 2004; Nicholas Jones <carpaski@gentoo.org> create-decls:
170     Changed tail to head and added a notice about duration of glibc check.
171    
172     21 Dec 2003; Nicholas Jones <carpaski@gentoo.org> create-decls:
173     Changed the glibc subversion check to use /usr/bin/* instead of /bin/sh
174     as there isn't a guarentee that it is dynamic.
175    
176     02 Nov 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
177     If 'file' passed to before_syscall(const char *func, const char *file) is
178     invalid, we should set errno to ENOENT, and not EINVAL. This should
179     close bug #32238.
180    
181     14 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
182     Fix a bug that occurs mainly on 64bit arch, where the file passed to
183     the functions we wrap, is invalid, and then cause canonicalize to pass
184     garbage to before_syscall(), thanks to great detective work from
185     Andrea Luzzardi <al@sig11.org> (bug #29846).
186    
187     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
188     Add a uClibc detection patch from Peter S. Mazinger <ps.m@gmx.net>.
189    
190     13 Oct 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
191     Fix a bug in libsandbox.c 's checking in the rename wrapper - it basically
192     only checked the destination patch, and not the source, so we could move
193     a protected file to a unprotected directory, and then delete/modify it.
194     Thanks to Andrea Luzzardi (scox) <al@sig11.org>, bug #30992, for this fix.
195    
196     12 Oct 2003; Nicholas Jones <carpaski@gentoo.org> sandbox.c :
197     Added python2.3 to the predict section/variable.
198    
199     28 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, sandbox.c,
200     sandbox.h, sandbox_futils.c :
201     Add support to set the pids file via SANDBOX_PIDS_FILE at startup. If
202     it is not set, it will revert to its old value.
203    
204     27 Sep 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
205     Fix our mkdir wrapper to check if the dir exist, and return EEXIST if so,
206     rather than failing with a violation, bug #29748.
207    
208     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
209     Fix canonicalize() to ignore calls with path = "".
210    
211     27 Jul 2003; Martin Schlemmer <azarah@gentoo.org> getcwd.c, libsandbox.c,
212     sandbox_futils.c, canonicalize.c :
213     Once again coreutils fails, as my systems had 2.5 kernel, the getcwd system
214     call handled strings larger than PATH_MAX (bug #21766). It however does not
215     work the same on 2.4 kernels.
216    
217     To fix, I added the posix implementation of getcwd() (from glibc cvs) that
218     do not need the system call. We use the default getcwd() function via a
219     wrapper (egetcwd), and then lstat the returned path. If lstat fails, it
220     means the current directory was removed, OR that the the system call for
221     getcwd failed (curious is that it do not fail and return NULL or set
222     errno, but rather just truncate the retured directory - usually from the
223     start), and if so, we use the generic getcwd() function (__egetcwd). Note
224     that we do not use the generic version all the time, as it calls lstat()
225     a great number of times, and performance degrade much.
226    
227     29 Jun 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls,
228     libsandbox.c :
229     Make sure SB_PATH_MAX will not wrap. Fix two possible memory leaks.
230    
231     22 Jun 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c, canonicalize.c
232     create-localdecls :
233     When checking path names of files accessed, we need to canonicalize it, else
234     it may be a symlink in a 'write allowed' directory pointing to a file in a
235     directory we should not have write access to.
236    
237     With something like coreutils-5.0, we have two problems:
238     1) One of the tests checks if getcwd() can return a path longer than
239     PATH_MAX. This test then tries to create a dir which even while
240     created local (mkdir("conftest2")), it ends up being resolved with
241     a name that is much larger than PATH_MAX. The problem now is that
242     canonicalize() have undefined behaviour when the path was too long
243     (returned wrongly truncated paths, etc), and pass the wrong path to
244     before_syscall() (causing the bogus sandbox violations).
245     2) The ecanonicalize() function we used, along with the canonicalize()
246     function did not support longer than PATH_MAX. This is partly a
247     cause for 1), but the error checking (rather lack of it) of calls
248     to erealpath() in canonicalize() was the prime reason for 1).
249    
250     As we do not use this canonicalized name to call the function, we resolve this
251     by fixing canonicalize() to do better error checking, and ecanonicalize() as
252     well as all functions in libsandbox.c to use a PATH_MAX of 'PATH_MAX * 2'.
253     While they will resolve paths properly now, and can check if a write/read is
254     allowed, the functions called from the sandboxed environment will still work
255     as expected.
256    
257     This should resolve bug #21766.
258    
259     06 Apr 2003; Martin Schlemmer <azarah@gentoo.org> libsandbox.c :
260     For some reason sandbox fails with a 'open_wr' if you run 'locale -a' under
261     it (bug #16298).
262    
263     Problem is that for some reason locale fopen's locale.alias with mode "rm".
264    
265     -------------------------------------------------------
266     nosferatu root # grep fopen locale.log
267     fopen("/usr/share/locale/locale.alias", "rm"ACCESS DENIED open_wr: /usr/share/locale/locale.alias
268     nosferatu root #
269     --------------------------------------------------------
270    
271     I checked the source of locale, but it have fopen with mode 'r', so
272     not sure where the "rm" mode comes from. Anyhow, changed the check in
273     before_syscall_open_char() to also see mode "rm" as readonly.
274    
275     23 Feb 2003; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
276    
277     Add glibc-2.3 support.
278    
279     22 Feb 2003; Martin Schlemmer <azarah@gentoo.org> sandbox.c :
280    
281     Some /etc/ld.so.preload fixes. Just changed the #if defines to cover all
282     operations releated to preload, as well as only try to modify ld.so.preload
283     if we can. Also modify to write the pid to /tmp/sandboxpids.tmp even when
284     not using ld.so.preload. Fix to not write this instance of sandbox's pid
285     to /tmp/sandboxpids.tmp on exit if this is not the last sandbox running.
286    
287     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> Makefile :
288    
289     Changed the LD to CC for hppa.
290    
291     22 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
292    
293     Killed the previous changes I made.
294    
295     17 Feb 2003; Nicholas Jones <carpaski@gentoo.org> create-localdecls :
296    
297     Added parisc to BROKEN_RTLD_ARCHLIST to see if it we can fix the relocation probs.
298    
299     09 Jan 2003; J Robert Ray <jrray@gentoo.org> sandbox.c :
300    
301     Don't segfault if $HOME isn't set, set $HOME to "/" instead. Fixes bug 10868.
302    
303     16 Dec 2002; Martin Schlemmer <azarah@gentoo.org> create-localdecls :
304    
305     Fix memory leak for mips, bug #12236. Thanks to Torgeir Hansen <torgeir@trenger.ro>
306     for this fix.
307    
308     4 Dec 2002; J Robert Ray <jrray@gentoo.org> sandbox.h sandbox_futils.c :
309    
310     sandbox_futils defined a dirname() function that was masking the same
311     function in glibc and was broken (e.g.: SANDBOX_DIR was being set to
312     '/usr/lib/portage/bi/'). Fixed function to return expected results and
313     renamed it to sb_dirname() to no longer mask the glibc function. Closes bug
314     11231.
315    
316     4 Dec 2002; Martin Schlemmer <azarah@gentoo.org> :
317    
318     Fix a segfault in libsandbox.c if canonicalize() was called with
319     first parameter = NULL.
320    
321     1 Sep 2002; Martin Schlemmer <azarah@gentoo.org> :
322    
323     Fix my braindead 'return 1;' in a void function. Updated sandbox.c,
324     cleanup() for this.
325    
326     Change cleanup() in sandbox.c not to exit with fail status if
327     the pidsfile is missing. We really should still display sandbox
328     violations if they occured.
329    
330     31 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
331    
332     Update cleanup() in sandbox.c to remove the PIDSFILE if this is
333     the last sandbox running.
334    
335     25 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
336    
337     Major cleanups to mainly libsandbox.c again.
338    
339     22 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
340    
341     Add copyrights to sandbox.h and sandbox_futils.h. If wrong, the
342     parties involved should please contact me so that we can fix it.
343    
344     Add opendir wrapper to libsandbox.c.
345    
346     21 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
347    
348     Do some more cleanups to ecanonicalize(), as it dropped filenames in
349     rare cases (after my symlink cleanups), and caused glibc to bork.
350     These fixes went into canonicalize.c.
351    
352     20 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
353    
354     Fix spawn_shell() and main() in sandbox.c to properly return fail
355     status.
356    
357     19 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
358    
359     The new canonicalize() function in libsandbox.c also resolved symlinks,
360     which caused on cleaning sandbox errors if the symlink pointed to a
361     file in the live root. Ripped out canonicalize() and realpath() from
362     glibc; removed the symlink stuff, and changed them to ecanonicalize()
363     and erealpath().
364    
365     18 Aug 2002; Martin Schlemmer <azarah@gentoo.org> :
366    
367     Ripped out all the wrappers, and implemented those of InstallWatch.
368     Losts of cleanups and bugfixes. Implement a execve that forces
369     $LIBSANDBOX in $LD_PRELOAD. We can now thus do away with the feared
370     /etc/ld.so.preload (*g*) ... Made the needed changes to sandbox.c,
371     sandbox.h and sandbox_futils.c. Rewrote the Makefile for most
372     parts; it now have an install target.
373    
374     Reformat the whole thing to look somewhat like the reworked sandbox.c
375     and new sandbox.h and sandbox_futils.c from:
376    
377     Brad House <brad@mainstreetsoftworks.com>.
378    
379     Additional Copyrights now due to the InstallWatch code:
380    
381     Copyright (C) 1998-9 Pancrazio `Ezio' de Mauro <p@demauro.net>

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